MDL-40415 add explicit OPcache support

admin/cli/install.php

@@ -36,6 +36,12 @@ if (isset($_SERVER['REMOTE_ADDR'])) {
     exit(1);
 }
 
+// Force OPcache reset if used, we do not want any stale caches
+// when preparing test environment.
+if (function_exists('opcache_reset')) {
+    opcache_reset();
+}
+
 $help =
 "Command line Moodle installer, creates config.php and initializes database.
 Please note you must execute this script with the same uid as apache

admin/cli/install_database.php

@@ -36,6 +36,12 @@ if (isset($_SERVER['REMOTE_ADDR'])) {
     exit(1);
 }
 
+// Force OPcache reset if used, we do not want any stale caches
+// when preparing test environment.
+if (function_exists('opcache_reset')) {
+    opcache_reset();
+}
+
 $help =
 "Advanced command line Moodle database installer.
 Please note you must execute this script with the same uid as apache.

admin/cli/upgrade.php

@@ -29,6 +29,12 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+// Force OPcache reset if used, we do not want any stale caches
+// when detecting if upgrade necessary or when running upgrade.
+if (function_exists('opcache_reset') and !isset($_SERVER['REMOTE_ADDR'])) {
+    opcache_reset();
+}
+
 define('CLI_SCRIPT', true);
 define('CACHE_DISABLE_ALL', true);